92 lines
1.8 KiB
C++
92 lines
1.8 KiB
C++
// Copyright (C) 2012 Vicente Botet
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <boost/config.hpp>
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#if ! defined BOOST_NO_CXX11_DECLTYPE
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#define BOOST_RESULT_OF_USE_DECLTYPE
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#endif
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#define BOOST_THREAD_VERSION 4
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#define BOOST_THREAD_PROVIDES_EXECUTORS
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#include <boost/thread/experimental/task_region.hpp>
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#include <iostream>
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#if ! defined BOOST_NO_CXX11_RANGE_BASED_FOR && ! defined BOOST_NO_CXX11_LAMBDAS
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int fib_task_region(int n)
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{
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using boost::experimental::parallel::task_region;
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using boost::experimental::parallel::task_region_handle;
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if (n == 0) return 0;
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if (n == 1) return 1;
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int n1;
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int n2;
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task_region([&](task_region_handle& trh)
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{
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trh.run([&]
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{
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n1 = fib_task_region(n - 1);
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});
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n2 = fib_task_region(n - 2);
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});
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return n1 + n2;
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}
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#if defined BOOST_THREAD_PROVIDES_EXECUTORS
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template <class Ex>
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int fib_task_region_gen( Ex& ex, int n)
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{
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using boost::experimental::parallel::task_region;
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using boost::experimental::parallel::task_region_handle_gen;
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if (n == 0) return 0;
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if (n == 1) return 1;
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int n1;
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int n2;
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task_region(ex, [&](task_region_handle_gen<Ex>& trh)
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{
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trh.run([&]
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{
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n1 = fib_task_region(n - 1);
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});
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n2 = fib_task_region(n - 2);
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});
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return n1 + n2;
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}
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#endif
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int main()
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{
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for (int i = 0; i<10; ++i) {
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std::cout << fib_task_region(i) << " ";
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}
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std::cout << std::endl;
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#if defined BOOST_THREAD_PROVIDES_EXECUTORS
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boost::basic_thread_pool tp;
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for (int i = 0; i<10; ++i) {
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std::cout << fib_task_region_gen(tp,i) << " ";
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}
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std::cout << std::endl;
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#endif
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return 0;
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}
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#else
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int main()
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{
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return 0;
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}
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#endif
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